function validateEmail(email) {
const re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(String(email).toLowerCase());
}
var emailRegex = /^[-!#$%&'*+\/0-9=?A-Z^_a-z{|}~](\.?[-!#$%&'*+\/0-9=?A-Z^_a-z`{|}~])*@[a-zA-Z0-9](-*\.?[a-zA-Z0-9])*\.[a-zA-Z](-?[a-zA-Z0-9])+$/;
function isEmailValid(email) {
if (!email)
return false;
if(email.length>254)
return false;
var valid = emailRegex.test(email);
if(!valid)
return false;
// Further checking of some things regex can't handle
var parts = email.split("@");
if(parts[0].length>64)
return false;
var domainParts = parts[1].split(".");
if(domainParts.some(function(part) { return part.length>63; }))
return false;
return true;
}